Ayodhyākānda - Canto 88

Showing to Kausalyā and others the bed of Kuśa grass on which Śrī Rāma and Sītā spent their night, and contrasting it with the royal splendour and luxury in which he lived in Ayodhyā, Bharata laments for him and, holding himself responsible for this turn of events and complimenting Laksmana and Sītā for throwing their lot with Śrī Rāma and sharing his privations, makes up his mind henceforth to dwell in the forest as a representative of Śrī Rāma, wearing matted locks on his head like him.